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If The Card Fits

io.github.sjgiewont/if-the-card-fits · v1.0.0

Which credit cards a household should carry, simulated over 5 years on weekly-verified terms.

Connect Remote server

Terminal
claude mcp add --transport http if-the-card-fits https://ifthecardfits.com/mcp
~/.cursor/mcp.json
{
  "mcpServers": {
    "if-the-card-fits": {
      "url": "https://ifthecardfits.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "if-the-card-fits": {
      "type": "http",
      "url": "https://ifthecardfits.com/mcp"
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://ifthecardfits.com/mcp

Tools 4 found in our last check

  • spending_categories

    The 19 categories this API scores spending against. Call this first and map the person's statement onto these ids before calling simulate_cards.

  • simulate_cards

    Given a year of spending by category, returns the three best credit cards and the best two-card combination, with what each is worth after its annual fee over the chosen horizon. Figures come from a model checked to the cent against an independent reference calculator, against c…

  • keep_or_cancel

    For cards the person already carries, says whether each one still earns its annual fee back on their spending, and what to move to if not. Pass the cards as `held`. Returns a verdict and a rounded yearly margin.

  • compare_two

    Two named cards head to head on the person's own spending: which one pays more, and by how much a year. Use this when they are choosing between two specific cards. For 'what should I get', use simulate_cards instead.

Details

Endpointhttps://ifthecardfits.com/mcp (Streamable HTTP)
First published27 Oct 2026
Last updated27 Oct 2026
Registry nameio.github.sjgiewont/if-the-card-fits

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